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MW 18x1.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010037

GTIN/EAN: 5906301810360

5.00
Load capacity 0.95 kg / 9.34 N Magnetic Induction 101.91 mT / 1019 Gs
Diameter Ø
18 mm [±0,1 mm]
Height
1.5 mm [±0,1 mm]
Weight
2.86 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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Frequently asked questions

What is the maximum working temperature of a disc magnet?
Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.
What is the difference between N38, N42 and N52?
The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.
What is the dimensional tolerance?
±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

Guides from the knowledge base

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical parameters - MW 18x1.5 / N38 - cylindrical magnet

Specification / characteristics - MW 18x1.5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010037
GTIN/EAN 5906301810360
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 18 mm [±0,1 mm]
Height 1.5 mm [±0,1 mm]
Weight 2.86 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.95 kg / 9.34 N
Magnetic Induction ~ ? 101.91 mT / 1019 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 18x1.5 / N38 - cylindrical magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
properties values units
Vickers hardness ≥550 Hv
Density ≥7.4 g/cm3
Curie Temperature TC 310 °C
Curie Temperature TF 590 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Physical modeling of the product - report

These data represent the outcome of a engineering analysis. Results were calculated on models for the class Nd2Fe14B. Actual conditions may differ from theoretical values. Treat these data as a supplementary guide during assembly planning.

Table 1: Static force (force vs gap) - interaction chart
MW 18x1.5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 1019 Gs
101.9 mT
 0.95 kg / 2.09 LBS
950.0 g / 9.3 N
 weak grip
1 mm 975 Gs
97.5 mT
 0.87 kg / 1.92 LBS
869.2 g / 8.5 N
 weak grip
2 mm 902 Gs
90.2 mT
 0.74 kg / 1.64 LBS
744.7 g / 7.3 N
 weak grip
3 mm 812 Gs
81.2 mT
 0.60 kg / 1.33 LBS
603.4 g / 5.9 N
 weak grip
5 mm 619 Gs
61.9 mT
 0.35 kg / 0.77 LBS
350.6 g / 3.4 N
 weak grip
10 mm 274 Gs
27.4 mT
 0.07 kg / 0.15 LBS
68.7 g / 0.7 N
 weak grip
15 mm 126 Gs
12.6 mT
 0.01 kg / 0.03 LBS
14.6 g / 0.1 N
 weak grip
20 mm 65 Gs
6.5 mT
 0.00 kg / 0.01 LBS
3.9 g / 0.0 N
 weak grip
30 mm 23 Gs
2.3 mT
 0.00 kg / 0.00 LBS
0.5 g / 0.0 N
 weak grip
50 mm 6 Gs
0.6 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 weak grip
Grip strength weakens drastically with every mm of gap. Remember that even the smallest gap (e.g., contamination, paint, rust) strongly weakens the grip. Neodymiums operate optimally in perfect adhesion; air break drastically cuts the power. Observe how rapidly the load capacity fall, when the magnet does not adhere directly to the steel surface. When calculating the mounting, avoid additional spacers.

Table 2: Vertical hold (wall)
MW 18x1.5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.19 kg / 0.42 LBS
190.0 g / 1.9 N
1 mm Stal (~0.2) 0.17 kg / 0.38 LBS
174.0 g / 1.7 N
2 mm Stal (~0.2) 0.15 kg / 0.33 LBS
148.0 g / 1.5 N
3 mm Stal (~0.2) 0.12 kg / 0.26 LBS
120.0 g / 1.2 N
5 mm Stal (~0.2) 0.07 kg / 0.15 LBS
70.0 g / 0.7 N
10 mm Stal (~0.2) 0.01 kg / 0.03 LBS
14.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
The following data presents the estimated shear load sufficient to start the slippage of the magnet vertically on a vertical metal surface (considering typical friction coefficient). This parameter is a function of the separation distance between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 18x1.5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.29 kg / 0.63 LBS
285.0 g / 2.8 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.19 kg / 0.42 LBS
190.0 g / 1.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.10 kg / 0.21 LBS
95.0 g / 0.9 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.48 kg / 1.05 LBS
475.0 g / 4.7 N
When hanging a holder on a vertical surface (e.g., a board), it you can count on just approx. 1/5 of its maximum pull force. Gravity as well as a low friction coefficient mean that products move down easier than they pop off the substrate. Planning a wall mount? Consider that the sliding force is noticeably lower than the maximum static pull force. On a smooth steel, the holder will slip down under a noticeably lighter weight. Using a rubber pad can drastically improve the result.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 18x1.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.10 kg / 0.21 LBS
95.0 g / 0.9 N
1 mm
25%
 0.24 kg / 0.52 LBS
237.5 g / 2.3 N
2 mm
50%
 0.48 kg / 1.05 LBS
475.0 g / 4.7 N
3 mm
75%
 0.71 kg / 1.57 LBS
712.5 g / 7.0 N
5 mm
100%
 0.95 kg / 2.09 LBS
950.0 g / 9.3 N
10 mm
100%
 0.95 kg / 2.09 LBS
950.0 g / 9.3 N
11 mm
100%
 0.95 kg / 2.09 LBS
950.0 g / 9.3 N
12 mm
100%
 0.95 kg / 2.09 LBS
950.0 g / 9.3 N
A too thin steel cannot take in the entire magnetic field, which wastes potential of the magnet. Should you mount a strong magnet to a too thin substrate, the flux will penetrate right through and the pull force will drop sharply. To achieve full efficiency of this neodymium's potential, you require a sufficiently solid backing of steel. The saturation phenomenon causes that on delicate walls (e.g., appliance housings), the magnet shows lower pull force. We advise picking the steel thickness based on the following data.

Table 5: Thermal resistance (material behavior) - power drop
MW 18x1.5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.95 kg / 2.09 LBS
950.0 g / 9.3 N
 OK
40 °C -2.2% 0.93 kg / 2.05 LBS
929.1 g / 9.1 N
 OK
60 °C -4.4% 0.91 kg / 2.00 LBS
908.2 g / 8.9 N
80 °C -6.6% 0.89 kg / 1.96 LBS
887.3 g / 8.7 N
100 °C -28.8% 0.68 kg / 1.49 LBS
676.4 g / 6.6 N
Classic neodymiums lose power above the temperature limit. Protect against heat – excessive heat can permanently destroy this magnet. With every degree above norm, the neodymium's power briefly decreases. Avoid using this magnet close to heaters exceeding its safe range. Too high temperature will cause irreversible degradation of magnetic properties.
*Important note: Thermal stability is determined by both grade, as well as the dimension ratios. Flat magnets (pancake types) risk losing magnetic properties under lower heat stress compared to rod magnets. Red status in the table indicates a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field range
MW 18x1.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.63 kg / 3.59 LBS
1 960 Gs
0.24 kg / 0.54 LBS
244 g / 2.4 N
 N/A
1 mm 1.57 kg / 3.47 LBS
2 002 Gs
0.24 kg / 0.52 LBS
236 g / 2.3 N
 1.41 kg / 3.12 LBS
~0 Gs
2 mm 1.49 kg / 3.29 LBS
1 949 Gs
0.22 kg / 0.49 LBS
224 g / 2.2 N
 1.34 kg / 2.96 LBS
~0 Gs
3 mm 1.39 kg / 3.06 LBS
1 883 Gs
0.21 kg / 0.46 LBS
209 g / 2.0 N
 1.25 kg / 2.76 LBS
~0 Gs
5 mm 1.16 kg / 2.55 LBS
1 717 Gs
0.17 kg / 0.38 LBS
174 g / 1.7 N
 1.04 kg / 2.30 LBS
~0 Gs
10 mm 0.60 kg / 1.33 LBS
1 238 Gs
0.09 kg / 0.20 LBS
90 g / 0.9 N
 0.54 kg / 1.19 LBS
~0 Gs
20 mm 0.12 kg / 0.26 LBS
548 Gs
0.02 kg / 0.04 LBS
18 g / 0.2 N
 0.11 kg / 0.23 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
74 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
60 mm 0.00 kg / 0.00 LBS
46 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
70 mm 0.00 kg / 0.00 LBS
30 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
80 mm 0.00 kg / 0.00 LBS
21 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
90 mm 0.00 kg / 0.00 LBS
15 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
100 mm 0.00 kg / 0.00 LBS
11 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
Two magnets attract each other from a wider radius than a magnet and steel setup. The setup of two magnets generates a stronger field and a wider radius of performance. Designing a strong closure? Use a pair of magnets instead of one magnet and a striker plate. Remember that when attracting two neodymiums, the pinch force is huge. The levitation is marginally weaker than the attraction, but still impressive.
*Flux density for N-N configuration is approximately ~0 Gs at the midpoint between the magnets (resulting from vector opposition).
Important: Results show sliding force of two identical magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - precautionary measures
MW 18x1.5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 5.5 cm
Hearing aid 10 Gs (1.0 mT) 4.5 cm
Timepiece 20 Gs (2.0 mT) 3.5 cm
Mobile device 40 Gs (4.0 mT) 2.5 cm
Car key 50 Gs (5.0 mT) 2.5 cm
Payment card 400 Gs (40.0 mT) 1.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
A strong magnetic field is a serious hazard to electronics as well as pacemakers. These NdFeB products produce a field that disrupts operation of digital equipment. Remember: the invisible magnetic field passes through tissues and glass. Increased vigilance must be taken by people with cochlear implants and insulin pumps. Influence will be felt by: automatic timepieces, remotes, membranes, and displays. Do not place the magnet near cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
MW 18x1.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 19.36 km/h
(5.38 m/s)
 0.04 J
30 mm 19.87 km/h
(5.52 m/s)
 0.04 J
50 mm 19.88 km/h
(5.52 m/s)
 0.04 J
100 mm 19.88 km/h
(5.52 m/s)
 0.04 J
Neodymium magnets are very brittle – a collision with steel causes immediate chipping. Pay attention to connection velocity – a magnet released freely turns into a projectile. Striking energy can cause material chips or dangerous crushing to fingers. Always hold the magnet during bringing near metal so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear eye protection when playing with large magnets.

Table 9: Surface protection spec
MW 18x1.5 / N38

Technical parameter Value / Description
Coating type [NiCuNi] Nickel
Layer structure Nickel - Copper - Nickel
Layer thickness 10-20 µm
Salt spray test (SST) ? 24 h
Recommended environment Indoors only (dry)
Neodymium magnets are highly susceptible to corrosion without proper protection. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (Flux)
MW 18x1.5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 3 519 Mx 35.2 µWb
Pc Coefficient 0.13 Low (Flat)
Total magnetic flux emitted by the pole surface. Essential parameter for generator designers as well as sensors. Pc value defines the magnet's operating point.

Table 11: Submerged application
MW 18x1.5 / N38

Environment Effective steel pull Effect
Air (land) 0.95 kg Standard
Water (riverbed) 1.09 kg
(+0.14 kg buoyancy gain)
+14.5%
Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Water displaces steel, making heavy objects slightly lighter. Buoyancy helps in lifting finds.

1. Wall mount (shear)

*Note: On a vertical surface, the magnet retains merely a fraction of its max power.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) significantly reduces the holding force.

3. Heat tolerance

*For standard magnets, the critical limit is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.13

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The Pc (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher Pc value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical and environmental data

Chemical composition

iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%

Ecology and recycling (GPSR)

recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 010037-2026
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The presented product is an exceptionally strong cylinder magnet, made from advanced NdFeB material, which, at dimensions of Ø18x1.5 mm, guarantees optimal power. The MW 18x1.5 / N38 model boasts an accuracy of ±0.1mm and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 0.95 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Moreover, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is created for building electric motors, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the pull force of 9.34 N with a weight of only 2.86 g, this rod is indispensable in miniature devices and wherever low weight is crucial.
Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure long-term durability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Magnets NdFeB grade N38 are strong enough for the majority of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø18x1.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.
The presented product is a neodymium magnet with precisely defined parameters: diameter 18 mm and height 1.5 mm. The value of 9.34 N means that the magnet is capable of holding a weight many times exceeding its own mass of 2.86 g. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 1.5 mm), which means that the N and S poles are located on the flat, circular surfaces. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized diametrically if your project requires it.

Strengths as well as weaknesses of rare earth magnets.

Pros

Apart from their strong magnetism, neodymium magnets have these key benefits:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
  • Neodymium magnets are characterized by highly resistant to loss of magnetic properties caused by magnetic disturbances,
  • A magnet with a shiny nickel surface is more attractive,
  • Magnetic induction on the surface of the magnet is exceptional,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • In view of the potential of precise forming and customization to custom requirements, magnetic components can be created in a wide range of shapes and sizes, which amplifies use scope,
  • Fundamental importance in advanced technology sectors – they are utilized in hard drives, electric drive systems, medical equipment, also modern systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Disadvantages of neodymium magnets:
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
  • Limited possibility of making threads in the magnet and complex shapes - preferred is casing - mounting mechanism.
  • Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which is particularly important in the context of child health protection. Furthermore, small elements of these devices can disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Magnetic strength at its maximum – what affects it?

Holding force of 0.95 kg is a theoretical maximum value performed under standard conditions:
  • on a block made of mild steel, effectively closing the magnetic flux
  • whose transverse dimension equals approx. 10 mm
  • with a surface cleaned and smooth
  • with total lack of distance (no paint)
  • under perpendicular force direction (90-degree angle)
  • at room temperature

Lifting capacity in real conditions – factors

During everyday use, the real power is determined by many variables, ranked from crucial:
  • Distance (betwixt the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Material composition – different alloys reacts the same. High carbon content weaken the attraction effect.
  • Surface structure – the more even the surface, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Thermal environment – temperature increase causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, however under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Moreover, even a slight gap between the magnet and the plate lowers the holding force.

Warnings
Metal Allergy

Warning for allergy sufferers: The Ni-Cu-Ni coating consists of nickel. If redness occurs, immediately stop working with magnets and wear gloves.

Eye protection

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into hazardous fragments.

Do not underestimate power

Before starting, check safety instructions. Sudden snapping can break the magnet or injure your hand. Think ahead.

Safe distance

Do not bring magnets close to a wallet, computer, or screen. The magnetic field can permanently damage these devices and wipe information from cards.

Keep away from children

These products are not suitable for play. Accidental ingestion of several magnets may result in them attracting across intestines, which constitutes a severe health hazard and necessitates urgent medical intervention.

GPS and phone interference

Navigation devices and mobile phones are highly susceptible to magnetism. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Dust is flammable

Machining of NdFeB material poses a fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Pacemakers

Health Alert: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.

Permanent damage

Standard neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. Damage is permanent.

Hand protection

Risk of injury: The pulling power is so great that it can result in hematomas, crushing, and broken bones. Use thick gloves.

Warning! Looking for details? Read our article: Why are neodymium magnets dangerous?